<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <link rel="stylesheet" href="../bootstrap/css/bootstrap.css">
</head>
<body>

<button type="button" class="btn btn-lg btn-primary" disabled>Primary button</button>
<button type="button" class="btn btn-secondary btn-lg" disabled>Button</button>
                  
<script src="../bootstrap/js/bootstrap.js"></script>
</body>
</html>